Cooking device



E.y M. SNYDER.

COOKING DEVICE. APPLICATION FILED APR. 7. 1922.'

` "1,438,792, ,o Patented nec. 12,1922

z 'g2 ZZ/v Patented Der; l2, i922.

neurale EDITH MARIA SNYEER, OF VHAPITLIL'JEN, ONTARIG, CANADA.

COGKING DEVICE.

Application filed April 7,

To all er1/wm t may concern: j

Be it known that L lnrrn MARIA Sarnen, a subject of the King of `Great Britainyand a resident of the city of `Hamiltonj in the county of "Wentworth, in theProvince oi Ontario, Canada., have invented certain new and use'lul Improvements in a Cooking Device, of which the following; is a specification.

My invention relates to improvements in cooking devices with particular reference to portable ovens andthe object of the in# vention isto provide a portable devicein which any roasting or baking` operations may be eiifectively done upon practically any form of stove; a further object is to 'eiffect great economy in heat; and a further object is to permit more sanitary cooking by keeping the flame and products oit com-f bustion entirely out ot contact with the contents of the cooker; and a still further object is to make the device in a strongA and convenient form which may be inexpensively produced. a

My invention consists essentially of a cooking); device comgrisinggu separate upper and lower dished membersthe upper member adapted to be superimposed upon the lower member to form an entirely enclosed cooking' chamber within the members? both members having inner and outer spaced shells the space between saidspaced shells constituting; a flue channelv completely sur? roundingthe cooking;` chamber. the outer shell of the lower member having a large orifice in the bottom thereof and the outer shell of the upper member having a series of small orifices in the top thereof, all as hereinafter more particularly described and illustrated in the accompanying drawings in which,

Fin: l is a side elevation of my improved cooking device with a portion ot the near wall broken away to show the interiorq the section beine; taken about the longitudinal centre line of the device, an ordinary gas ringa upon which the device is supported being indicated diagrammatically.

Fig'. 2 is a plan view ot the top member of the device shown in the reversed or upside down position. j

Fig. 3 is a plan view of the lower member of the device. j

Like characters of reference indicate corresponding parts in the dillerent views.

l is my improved cooking` device which 1922. Serial No. 550,464.

comprises the upper dished member 2 superimposed. upon tlie lower dishedmember B and forming; between these members the enclosed cooking chamber l.

The upper member 2 comprises the inner shell 21 andthe outer shell .22 arranged in spaced relationship so that the space 23 is formed between the two shells.

Adjacent to the lower edge ot the upper memben the inner and outer. shells 4are connected by the web portion`2'1 which web portion is provided with the circumferen tially disposed spaced orifices 25. f

' The inner and outer shells 21 and 22 project slightly beyond the web 2L and form an annular recess extending around the lower edge or the upper member (see vat A in Fig. l). j

The outer shell of the upper member is provided with the series of small oriiices 26 in the top thereof. l

27 are two dependinglingers carried by the outer wall of the upper member.

The lower member 3 comprisesthe inner shell 31 and the outer shell 32 arranged in spaced `relationsliip so that the space 33 is formed between the two shells.

Alongfthe upper edge of thelower member, the inner and outer shells are connected by the web portion 34 which web portion is provided with the circumferentially disposer spaced orilices 35.

The outer shell of the lower member is provided with a large orifice 3 in the bottom thereof.

87 are two pairs oi spaced lugs carried by the lower member and each pair is adapted to receive one oir' the iinggers 27 of the upper member iter properly locating the upper and lowerymembers with respect to each other as will presently appear.

8S arespaced verticalsupports connecting the inner and outer shells of the lower member and are located circumferentially about the oriiice 801 and 39 are the open spaces between adjacent supports.

210 is a handle carried by the upper member and `310 are handles carried by the lower memben The portion 2l1 et the inner shell of the lower member which is located directly, above theloritice 3f is made et increased thickness andato the upper side thereof is secured a layer of asbestos 7. l

5 is a tray which is removably mounted within thecooking chamber being supported upon `rests b carried by the inner shell of the lower member.

This tray is made of open mesh so as to permit free circulation oit the air about the food within the cookingl chamber et.

8 indicates an ordinary `gas ring upon which the device is supported l).

The construction and operation ot my invention is as follows: Y, .3 H The upper and lower members would be most probably cast oit aluminum or other suitable metal. l l l After the articles to be cooked have been placed upon the tray 5 in the lower member, the upper member is superimposed over the lower member as shown inlfig.

`The members are so formed that the upper peripheral edgeof the lower member en.- gages the recess along the lower edge oie Lhe uppervinernber 4so that the upper member straddles the lower` and since thewebs 24 and Stemat-act withleach other tight joint is 'formed between the members (see at A in Figa-1).*

The oritices 25 and 35 in the webs are correspondingly disposed, so that when the lingers 27 engage the lugs 37 the orifices register. i

lt will now be apparent that since the orices 25 and 35 register7 that 'the spaces and 38 formed between the inner and outer e relis of the upper 'and lower members r "peictively, constitute la continuous chamber or ebannel surrounding thecooking chamber il, `For convenience in the description this will be indicated by the letter B.

The device is now placed over the source of heat which may be -a ras stove7 as .illustra'ted, or any other suitable type such as an oil stove7 so that the vflame is directly below the large orifice 36 in the lower memberv (see Fig. l). u

lt will now be evident that 'the Allame and practically all the heat from the stove will enter directly through the orifice 3G and tha both the flame itself and all the hot gases of combustion will pass upwardly through the' iue chamber B and will finally escape at the top through the series ,of criticos 3G. A.he path oit these gases is indicated by the small arrows in Fig. l. i

In this way the @greatest amount oit heat from the stove will be utilized in .actually heating the cooking chamber since it will all pass through the chamber B whichsurrounds the inner shell. v

It is to be noted that owing' to the method of connecting the upper and lower members that the cookingy chamber is entirely enclosed` and that while` the heat and all products ot combustion/'are brought into intimate heating communication `with the cooking` chamber that they arenot lpermitted'to enter the 'heatingchamber and therefore while the maximum heating effect of the stove 'is produced in the cooking chamber, the articles being cooked therein, are kept entirely out ot actual contact with the products ot combustion.

This is a most important feature from a sanitary point of view as in the ordinary typeo't oven at present used `with gas and oil stoves all the products o't combustion pass directly into the oven and are in direct contact with the food being cooked therein, consequently tending` to contaminate the food. i Furthermore since these former ovensfare more or less open, there is a very conside."-y able and serious waste of heat. This is not the case with my device in which the waste oit heat is reduced to a minimum. By having` the outer surface of the device polished the loss by radiation would be further minimiied. y y, The metal of the inner shell of the lower member has been shown as made of increased thickness directly above the orv n 35 to increase the, durability 'oi' the device.y since the flame bears directly upon the metal at vthis point. A layer of asbestos 7 is sevcured to the top of the metal 211 to euu'a'liife the distribution oi' heat 'throughout the device since the flame bearing directly on the metal 211 would ordinarily produce an eX- cessively hot spot within the cooking cham# ber adjacent to the metal 211. y

From the foregoing it will be seen that .l have devised an improved cooking device which will prove of great bene-tit and upon which all roasting' and baking operations may be conveniently and economically perl formed, and which will further enable this cooking to be done in a. more wholesome manner than hitherto. l y

' Many modications may be made in my invention without departing' from the spirit of the same or the scope of the claims and the form shown is tobe taken as illustrative only and not in a limiting sense. l

For instance the shape and size inay be altered as desired. Also the supports 8 might be omitted'and if desired a damper might be used for ree'ulating` the einfa openings 26.k

lWhat l claim as my invention is: l. it.. device of the class described compris inn` upper and lower dished merbers, the l er member adapted to lee-superimposed upon the lower member to form an enclosed cooking' chamber between the members, vboth members having double walls7 the spacelbetween the inner and outer walls 'ot the two members constituting' a continuous chamber surrounding' the cooking' chamber when the device is in the superimposed position. 4the outer wall of the lower member vhavigr-ig 'a 12:12pmV orifice at the bottomthereof and the outer wall ot the upper member having exhaust vent in the top thereof.

2, ,A device of the class described comprising upper and lower dished members, the upper member adapted to be superimposed upon the lower member to form an enclosed cooking chamber between the members, both members having double walls, webs connecting the lower edges of the inner and outer walls of the upper member and the upper edges of the inner and outer walls of the lower member, said webs provided with a plurality of registering orifices, the space between the inner and outer walls of the two members constituting a. continuous chamber surrounding the cooking chamber when the device is in the superimposed position, the

outer wall of the lower member having a large orice at' the bottom thereof andthe outer wall of the upper member having an exhaust vent in the top thereof.

3. A device of the class described comprising upper and lower dished members, the upper member adapted to be superimposed upon the lower member to form an enclosed cooking chamber between the members, both members having double walls, the space between the inner and outer walls of the twoy members constituting a continuous chamber surrounding the cooking chamber when the device is in the superimposed position, the outer wall of the lower member having a large oriiice at the bottom thereof and the outer wall of the upper member having an exhaust vent in the top thereof, the lower edge of the upper member 'being recessed `and the upper edge of the lower member adapted to engage said recess.

4. A device of the class described comprising upper and lower dished members, the upper member adapted to be superimposed upon the lower member to form an enclosed cooking chamber between the members, both members havingdouble walls, webs connecting the lower edges of the inner and outer walls of the upper member and the upper edges of the inner and outer walls of the lower member, said webs provided with a plurality of registering orifices, the space between the inner and outer walls of the two members constituting a continuous chamber surrounding the cooking chamber when the device is in the superimposed position, the outer wall of the lower member having a large orifice at the bottom thereof and the outer wall of the upper member having an exhaust vent in the top thereof, and positioning means carried bv the upper and lower members.

5. A device of the class described comprising upper and lower dished members, the upper member adapted to be superimposed upon the lower member to form an enclosed cooking chamber between the members, both members having double walls, the space between the inner and outer walls of the two members constituting a continuous chamber surrounding the cooking chamber when the device is in the superimposed position, the outer wall of the lower member having a large oriice at the bottom thereof and the outer wall of the upper member having an exhaust vent in the top thereof, and a layer of non-conducting material covering the lower portion of the inner wall of the lower member.

6. A device of the class described comprising upper and lower dished members, the upper member adapted to be, superimposed upon the lower member to form an enclosed cooking chamber between the members, both members having double walls, the space between the inner and outer walls of the two members constituting a continuous chamber surrounding the cooking chamber whenthe device is in the superimposed position, the outer wall of the lower member having `a large orifice at the bottom thereof and the outer wall of the upper member having an exhaust vent in the top thereof, and a layer of asbestos covering the lower portion of the inner wall of the lower member.

7. A device of the class described comprising upper and lower dished members, the uppermember adapted to be superimposed upon the lower member to form an enclosed cooking chamber between the members, both members havingdouble walls, the space between the inner and `outer walls of the two members constituting a `continuous chamber surrounding the cooking chamber when the device is in the superimposed position, the outer wall of the lower member having a large orifice at the bottom -thereof and the outer wall of the upper member having an exhaust vent in thetop thereof, the metal of the bottom portion of the lower member being of increased thickness and a layer of asbestos covering said thick portion.

8. A device of the class described comprising upper and lower dished members, the upper member adapted to be superimposed upon thelower member to form an enclosed cooking chamber between the members, both members havingdouble walls. the space between the inner and outer walls of the two members constituting a continuous chamber surrounding the cooking chamber when the device is in the superimposedposition, the outer wall of the lower member having a large orifice at the bottom thereof and the outer wall` of the upper member having an exhaust vent in the top thereof` and a horizontallv disposed tray within the cooking chamber.

Signed at the citnv of Hamilton, Ontario, Canada, the ith dav of .April 1922.

EDlTl-l MARIA SNYDER. 

